Senior Civil/Structural & Architectural Engineer

At Amentum, we're not just solving problems; we're engineering the future. Our team is driven by an unyielding commitment to innovation, integrity, and collaboration, tackling some of the most significant challenges in science, security, and sustainability. If you're passionate about making a real impact and want to be part of a community that values ethical excellence, this is the place where your ambition can thrive.

Here, we believe that success comes from continuously pushing boundaries and working together to deliver on our promises. We embrace challenges with confidence and are dedicated to creating a secure and vibrant future for all.

We’ll inspire and empower you to deliver your best work so you can evolve, grow and succeed – today and into tomorrow. We offer an exciting range of opportunities to develop your career within a supportive team who always strive to do the right thing for our people, clients and communities.

People are our greatest asset, and we offer a competitive package to retain and attract the best talent.

In addition to the benefits you’d expect, UK employees also receive free single medical cover and digital GP service, family-friendly benefits such as enhanced parental leave pay and free membership of employee assistance and parental programmes, plus reimbursement towards relevant professional development and memberships.

Work-life balance and flexibility is a key focus area for us. We’re happy to discuss hybrid, part-time and flexible working hours, patterns and locations to suit you and our business.

About the Opportunity

Amentum delivers innovative and sustainable solutions for complex environmental challenges and energy needs. We excel in areas such as environmental remediation, restoration, and compliance, ensuring the safe management of hazardous materials and contaminated sites.

We are committed to advancing energy initiatives providing expertise in renewable energy development, energy efficiency, and resilience projects. By leveraging advanced technologies and a deep understanding of regulatory frameworks, Amentum helps clients achieve environmental stewardship and energy sustainability, contributing to a safer, cleaner future while supporting mission-critical operations.

Within the defence sector, Amentum has an essential role in the UK’s continuous at-sea deterrent. We’re also active in naval infrastructure and shipbuilding, and in procurement and operational delivery across the whole of the UK Ministry of Defence.

Due to continued growth are currently seeking Senior CS&A Engineers to join our team, these positions support hybrid working and can be based across our office network within the UK - Stockton, Newcastle, Bristol, Gloucester, Glasgow, Westlakes and Warrington.

As a Senior CS&A Engineer your responsibilities could include:

• Lead the development of civil and structural engineering designs and solutions across the full project lifecycle

• Prepare technical documentation, specifications, and design justifications for safety-critical systems

• Oversight, verification and preparation of safety case inputs, such as Safety Functional Requirements (SFRs), Structural Design Method Statements (SDMSs) and Design Substantiation Reports (DSR).

• Oversight, verification and preparation of Interpretive Reports, Basis of Design, Analysis Reports, Calculations, CDM documentation, Material Specifications, Scopes of Work, and Technical Reports

• Demonstrate knowledge of the practical aspects of implementing engineering designs and understand the use of standards and compliance with regulatory requirements in an engineering environment.

• Manage and check deliverables from junior engineers to ensure compliance and quality.

• Provide technical guidance and mentorship to less experienced engineers.

• Interface with clients, regulators, and project stakeholders on technical matters.

• Ensure designs meet nuclear safety, cybersecurity, and quality standards.

• Support project planning, cost estimating, and risk management activities.

• Produce high-quality technical reports.

• Build and maintain valuable relationships with clients, partners and peers.

Here’s What You’ll Need:

• Chartered or near Chartered Engineer status with a relevant professional body (we will support you).

• Knowledge of civil engineering principals, design tools and relevant guidelines, standards and practices

• Ability to simplify complex problems.

• Experience using finite element modelling software and associated post processing software, with experience in validation and verification of modelling tools and their outputs.

• Good knowledge of health and safety legislation and good practice.

• Understanding of the use of design tools within a BIM environment.

• Experience in producing and checking high-quality technical deliverables

• Motivated team member with the ability to work to deadlines and communicate project progress.

• Good communication skills and ability to articulate information to a broad range of stakeholders.

• Committed to Continuous Professional Development

Our Culture

Our values are built on a strong foundation of safety, integrity, and respect for every individual. People are at the heart of our mission, and we believe in supporting one another through a culture of care and collaboration.

We strive to create a workplace where everyone feels they belong and can thrive. Supporting mental wellbeing and fostering a sense of connection are essential to how we work.

When we embrace different perspectives and work together, we become more innovative, more agile, and more successful.

We partner with VERCIDA, for greater online accessibility please visit to view and access our roles. As a Disability Confident employer, we will interview all disabled applicants who meet the minimum criteria for a vacancy. We welcome applications from candidates who are seeking flexible working and from those who may not meet all the listed requirements for a role.

If you require further support or reasonable adjustments with regards to the recruitment process (for example, you require the application form in a different format), please contact the team. #CSA2026